[backend]将testdata/下的测例替换为了赛方测试用例，更新了测试脚本

testdata/functional/39_op_priority5.sy

@@ -0,0 +1,15 @@
+int a = 1;
+int b = 0;
+int c = 1;
+int d = 2;
+int e = 4;
+int main()
+{
+	int flag=0;
+	if(a * b / c == e + d && a * (a + b) + c <= d + e || a - (b * c) == d - a / c)
+	{
+		flag=1;
+	}
+	putint(flag);
+	return flag;
+}